diff options
| -rw-r--r-- | docs-xml/smbdotconf/logon/allownt4crypto.xml | 26 | ||||
| -rw-r--r-- | lib/param/param_functions.c | 1 | ||||
| -rw-r--r-- | lib/param/param_table.c | 9 |
3 files changed, 36 insertions, 0 deletions
diff --git a/docs-xml/smbdotconf/logon/allownt4crypto.xml b/docs-xml/smbdotconf/logon/allownt4crypto.xml new file mode 100644 index 0000000000..4d417c71b3 --- /dev/null +++ b/docs-xml/smbdotconf/logon/allownt4crypto.xml @@ -0,0 +1,26 @@ +<samba:parameter name="allow nt4 crypto" + context="G" + type="boolean" + advanced="1" + xmlns:samba="http://www.samba.org/samba/DTD/samba-doc"> +<description> + <para>This option controls whether the netlogon server (currently + only in 'active directory domain controller' mode), will + reject clients which does not support NETLOGON_NEG_STRONG_KEYS + nor NETLOGON_NEG_SUPPORTS_AES.</para> + + <para>This option was added with Samba 4.2.0. It may lock out clients + which worked fine with Samba versions up to 4.1.x. as the effective default + was "yes" there, while it is "no" now.</para> + + <para>If you have clients without RequireStrongKey = 1 in the registry, + you may need to set "allow nt4 crypto = yes", until you have fixed all clients. + </para> + + <para>"allow nt4 crypto = yes" allows weak crypto to be negotiated, maybe via downgrade attacks.</para> + + <para>This option yields precedence to the 'reject md5 clients' option.</para> +</description> + +<value type="default">no</value> +</samba:parameter> diff --git a/lib/param/param_functions.c b/lib/param/param_functions.c index d04bc0de91..7d86828ee2 100644 --- a/lib/param/param_functions.c +++ b/lib/param/param_functions.c @@ -154,6 +154,7 @@ FN_LOCAL_PARM_BOOL(kernel_change_notify, bKernelChangeNotify) FN_LOCAL_BOOL(durable_handles, bDurableHandles) FN_GLOBAL_BOOL(allow_insecure_widelinks, bAllowInsecureWidelinks) +FN_GLOBAL_BOOL(allow_nt4_crypto, bAllowNT4Crypto) FN_GLOBAL_BOOL(allow_trusted_domains, bAllowTrustedDomains) FN_GLOBAL_BOOL(async_smb_echo_handler, bAsyncSMBEchoHandler) FN_GLOBAL_BOOL(bind_interfaces_only, bBindInterfacesOnly) diff --git a/lib/param/param_table.c b/lib/param/param_table.c index c79190c43c..8b6b234ea5 100644 --- a/lib/param/param_table.c +++ b/lib/param/param_table.c @@ -4316,6 +4316,15 @@ static struct parm_struct parm_table[] = { .special = NULL, .enum_list = NULL }, + { + .label = "allow nt4 crypto", + .type = P_BOOL, + .p_class = P_GLOBAL, + .offset = GLOBAL_VAR(bAllowNT4Crypto), + .special = NULL, + .enum_list = NULL, + .flags = FLAG_ADVANCED, + }, {N_("TLS options"), P_SEP, P_SEPARATOR}, |